Hydraulic punch



July 3, 1928.

l 'Wllllllllll' W/rA/ESS 1,675,369 w. MEsslNGER HYDRAULIC PUNCH Filed Feb. 19, 1927 v2 Sheets-Sheet l y l I l UML July 3, 1928.

W. MESSING ER HYDRAULIC PUNCH 2 Sheets-Sheet 2 Filed Feb. 19, 1927 Patented July 3, 1928.

UNITED STATES i V`PA'IENTOF FICE.`

`inrrmaunrc: BUNCH.

` "Appucauoh ma February ia, 1927. serial no. 163,503.`

The principal object of the presentin- V vention is to provide a compact, lightand portable hydraulic punch adaptedY for piercing holes in metal, for example, rivet or bolt 1 holes in structural shapes, I beams, channel sections or the like erected in structures, as elevator' shafts, and not accessible for fabrication by shop machinery.

It may be said descriptively and not by way of limitation that a hydraulic punch about to be described and embodying fea tures of the invention is about 9 by 9 by 6 in size, Weighs about forty-fiverpounds and is of about fifty tons capacity.`

The invention will be claimed at the end hereof but will be first described in connection with` the embodiment of `it chosen for illustration in the accompanying drawings forming parthereof and in which Figure 1 is a side elevation with parts broken away.

Fig. 2 is a top or plan view with parts broken away.

Fig. 3 is a sectional view taken generally on the line 3-3 ofv Fig. 2.

Fig. 4 is a fragmentary sectional view i taken on the line 4-4 of Fig. 2, and

Fig. 5 is an enlarged sectional plan view of parts shown in Fig. 2.

In the drawings 1 is a generally C-shaped frame having at the end of its lower arm 2 a claw 3 and having in the end of its upper arm 4 a cylinder space 5 aligned with the claw and having its head 6 inte ral with the upper arm. It may be remar ed that the cylinder or cylinder space 5 provides `a length of stroke exceeding the distance between the arms 2 and 4. The upper arm 4 has within it a reservoir 7. 8 is a toothed wheel arranged in a cavity in the upper arm 4 for rotation, and this wheel 8 is provided with a head 9 adapted to be turned,

for example, by means of a hand bar. 10 is a ram arranged in the cylinder 5 and it is introduced into the cylinder through the opening provided by the claw 3. In this way the. ram can be introduced into the cylinder although the latter is provided with an integral head 6, as has been stated, and the fact that the head 6 is integral, as is also the cylindrical Wall of the cylinder with the structure of the arm 4, is important because it enables the hydraulic pressure of the character mentioned to be resisted by the heat treated high strength steel of which the parts are constructed.

' from its Work.

The ram 10"`isprovided with rack `teeth which mesh with the teeth of the toothed wheel, so that the ram can be moved'with a quick motion, vfor example`,`up to or away 11 is a pump body applied to the lateral face of the upper arm and it is provided with hand operated pump elements and 'with relief and other valves. Y

The hand operated pump elements include the plunger 12 having rack teeth 13, mesh` ing with a toothed wheel 14, arranged in a cavity inthe body and having a head 15 op-l erable by a hand bar 16. 17 and 18 are the pump intake and outlet valves, and 19 is a relief valve. The fluidways are formed partly in the upper arm 4 and partly in the pump body 1l. The liuidway 2O connects with the pump passage 21 of the pump chamber 22 through the outlet vialve 18 with the cylinder 5. The fluidways 24 serve through the relief valve 19 to permit free How of fiuid from the cylinder 5 to the reservoir 7. 25 is a punch carried by the ram 10, and 26 is a die mounted in the claw 3, as shown, through the `intervention of a collar 27. 28 is a pin detachably arranged across the jaws 3 and in line with the opening of the die 26, and its purpose is to ar Vshape in practically any location Where the same is likely to be assembled in a struc-l ture. For example, it can be applied to the beams incorporated in elevator shafts, and this can be done in such a way that the hole can be punched wherever necessary. With the relief valve 19 open, the punch can be adjusted to its work with a quick movement by turning head 9 by a hand bar or otherwise. The relief valve 19 being closed and the pin 28 being in place, the hand bar 16 is operated to transfer iuid from the reservoir 7 to the top of the ram 10, and to build up in the cylinder 5 hydraulic pressure sufficient to drive the punch through the fiange or other like part of a structural shape of steel. The pin 28 serves to check the slug which escapes from the metal of the structural shape with such violence that unless checked it might cause injury.

It will be obvious to those skilled in the art to which the invention relates that modifications may be made in details o con-` struction and arrangement and in mattersof v mere form Without departing from the spirit of the invention which is not limited't0'suchA matters or otherwiselthan the prior art and ing a .length of stroke exceeding t e dis' `the body and in the upp tance between the arms` and said upper arm having Within it a reservoir and a toothed AWheel hand operated mechanism, a ram arranged in the' cylindeispmze and introducible therein through the opening provided bythe claw'said ram having rack teeth engaging the hand operated mechanism for quick motion, A:1"pu111'p' body applied to the lateral `face of the upper arm and provided with hand operated pump elements und relief and other valves, and Huidways vprovided in er arm.

WILLIAM MESSINGER. 

